Cita APA (7a ed.)

Johnson, K. (2001). An introduction to foreign language learning and teaching. Longman.

Cita Chicago Style (17a ed.)

Johnson, Keith. An Introduction to Foreign Language Learning and Teaching. Harlow, Essex, London ; New York: Longman, 2001.

Cita MLA (8a ed.)

Johnson, Keith. An Introduction to Foreign Language Learning and Teaching. Longman, 2001.